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**Bell Work Put in Scientific Notation 360 000000 g __________________**

Top of page 15 Put in Scientific Notation g __________________ 48000 m ______________________ cm ____________________ X (DO THE OPPOSITE)___________

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**Dimensional Analysis Page 13 of Notebook**

Scientific Notation & Dimensional Analysis Page 13 of Notebook

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**Ojective: Write numbers in Scientific Notation**

Evaluate word problems using Scientific Notation Evaluate Dimensional Analysis

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Main Idea Read Aloud Page 40

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**WHAT IS SCIENTIFIC NOTATION?**

A SHORT WAY TO WRITE VERY SMALL OR VERY LARGE NUMBERS 1,000,000,000,000 cm 1.0 X cm

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**Rules for Scientific Notation**

Page 12 Put the Decimal after the 1st digit and drop the zeroes To find the exponent count the number of places from the end of the number. x 103

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**Guided Practice: Turn to Page 40 in your chemistry text book**

Example Problem 2.2: The diameter of the sun is 1,392,000 km The density of the sun’s lower atmosphere is g/cm3

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**Rules for Multiplication/Division in Scientific Notation**

Page 14 Multiplication Division Multiply Coefficients 2. Add the exponents (base 10 remains) Divide the coefficients Subtract Exponents (base 10 remains).

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**Page 41; Problems 11 & 12 Page 42; Problems 15 & 16**

Independent Practice Page 41; Problems 11 & 12 Page 42; Problems 15 & 16

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**What is Dimensional Analysis?**

A systematic approach to solving problems that using conversions factors. Conversion factor-ratio of equivalent factors Example: 1000 meter = 1 kilometer or 1km 1000m Reciprocal ?

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Guided Practice Page 45; Problems

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**Classwork/The Price of Gasoline**

Assume that the Gasoline in Europe cost $0.989 per liter and the current price is $2.59 per gallon in the United States. Which country has the lowest price. 1L = 1 quart 4 quarts = 1 gallon

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**Answer to Group Activity 1**

$3.96 /gallon The European Gas is extremely expensive.

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**Extra-Credit/Cooking Conversion**

The density of peanut oil is g/mL. There are 237 mL in a measuring cup. If a recipe calls for ¼ cup of peanut oil, How many grams of peanut oil are required(hint: .250= ¼ ) ?

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**Answer to Group Activity 2**

54.4 grams

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